(A) : A normal human eye can clearly see all the 
objects at the different distance.
(R) : The human eye has the capacity to suitably 
adjust the focal length of its lens to a certain 
extent. 

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

'A' is true and 'R' is false

Both 'A' and ‘R’ are false